Oil burner



July 1,1941. L o. sELBY OIL BURNER Filed Nov. 29, 1939 Patented July 1, 1941 UNITED STATES.v PATENT OFFICE" Lynn 0. Selby, Cromwell, Conn.,A assignorto The y Sparmal Engineering Corporation, a corpora- I tion of Connecticut Application November 29, 1939, Serial No. 306,671

7 Claims'.

My invention relates to oil burners.

It has among its objects to provide an improved oil burner, and, more particularly, to provide such an improved burner of the so-called combined power and distillate type. A further object of my invention is to provide an improved burner base for such combined burners wherein, through an improved structure of the power burner and associated distillate burner, it is made possible materially to increase the capacity of the power burner. A further object of my inventionisto provide such an improved construction wherein through an improved arrangement it is made possible to dispose the vaporizing chamber of the power burner in the space previously occupied by the vaporizing chamber of the distillate burner, in such manner as thus materially to increase the capacity of the power burner and the quantity of oil capable of being vaporized thereby in a given time interval, while also disposing the vaporizer for the distillate burner sin 'an improved location enabling the latter to continue to function satisfactorily as a heating means for the power burner during starting and operation of the latter. These and other objects` and advantages of my improved construction will, however, hereinafter more fully appear.

In the accompanying drawing, I have shown for` purposes of illustration one embodiment which my invention may assume in practice.

' In this drawing:

Figure 1 is a vertical sectional view of a burner equipped with my improvements;

Fig. 2 is a plan View of the burner base, the

shells being omitted and the section on which Figure 1 is taken being indicated on line I-I, while parts are broken away to facilitate illustration;

Fig. 3 is a section on line 3--3 of Figure 2, but with the shells shown thereon and broken away to facilitate illustration;

Fig. 4 is a detail section on line 4 4 of Figure 2, and

Fig. 5 is a semi-diagrammatic view of a form of heater installation equipped with my improvements.

In this illustrative construction, I have shown a burner base, generally indicated at I, provided with usual inner and outer grooves- 2 and 3 for the distillate burner and usual starting wicks 4 in these grooves and perforate shells 5 defining combustion spaces above the grooves and having usual air passages 6 and 1 and usual cover plates, or rings, 8, 8a, while the inner and outer grooves 2 are adapted =to communicate with one another through any suitable radially located passages,` as, for example, the passage 4a. As illustrated, this distillate burner construction has apower burner, generally indicated vat 9, of an improved construction 'axially located therein and vim proved vaporizing means for both this power burner and the'di-stillate burner disposed infimprovedlocations and -functioning in an improved manner, as' hereinafter more fully described,

Referring more particularly to the power burf ner 9, it will be noted thatthe lsame ,if vc ifan improved construction and of increased dimenf sions Vand has an4 enlarged vaporizing chamber disposed in the space previously occupied by' the vaporizing chamber for the distillatefb'urner. More particularly, it is provided with a vaporiz-Y ing 'chamber I0 in the burner base I, which, while annular and shallow, is of substantially increased horizontal cross section as compared withvprior constructions. x terially to increase the area ofthe bottom of this chamber and the resultant capacityA thereof to vaporize an increased quantity of oil delivered thereto through a usual carbonv leg or vaporizer I I`while maintaining'the maximum depth of oil during starting within the desired limits. While, if desired, the bottom of this chamber Ill'may be disposed in theplane of the bottoms of the grooves 2 and 3, the bottom of the same is preferably disposed slightly below `Vthe bottoms of these grooves, ,asillustrated, in such manner as thereby further to increase the vaporiring capacity lof this 'chamber I0. Further, it will be noted that this vaporizing chamber fIIl lis disposed coaxially around an upwardlyv directed axial air tube I2 supplied with air under pressure through an axial-supply pipe I3; this airv tube herein also being of increased diameterfas compared with prior constructions, and having the supply pipe I3 thereto also of increased diameter. If desired, this pipe I3 may have the passage'means therein of the same diameterf as the inner diameter of the tube l2, but preferably the inside diameter of the pipe I3 is slightly less than the inside diameter ofthe tube I2. Also, in this construction a bailie ring 'I4 is supported on the outer walls I5 of thevaporizingchamber I 0 and within an imperforate, combustion chamber forming tube I6 extending up through the shells 5 and having an outlet I1' at the top thereof within the cover'plate 8. While this bafne ring may, if desired, have an axial opening .I8 of substantially the diameter of the air pas- Sage through the tube l2, preferably the opening Thus, rit isfmade possible ma# thistemperature in a--usual manner.

I8 in this ring is slightly larger than the air passage through the tube I2.

In this construction, the distillate burner is provided with vaporizing means located in an improved location, as compared with prior combined distillate and power burners of this type. More particularly, it will be observed that a vaporizing chamber I9 is provided in the burner base I and transversely disposed between the grooves Zand 3, in such manner as to connect the same while providing for the distribution of the vapor from this chamber to both grooves; Herein, the chamber I9 has a carbon leg'Y or vaporizer 20 connected to the bottom thereof midway between the inner and outerends of the chamber and the wicks 4; While, if'desired, this vaporizdng 'chamber may be provided in the form of a transverse passage in'base casting, I between the grooves, preferably, in order to permit ready access to the chamber I9 and to facilitatecleaning, itis provided with a removable cover platefZIV which closes this vaporizing chamber I9; While underlying the two inner shells. Here attentionY isl alsof directed -.to V the fact4 that this vaporizing chamber# I 9 .is disposed .symmetrically with the`- radial .passages 4a 4in such mannerA that withfthevaporizing chamber and-two such passageslat: vapor generated lduring starting -inthe chamber I9;` orvgeneratedinthecarbon leg` 20 during operation or the burner, may.. pass: freely between-the' grooves; 2k andv- 3-.and :effect an equal.

distributiontof'th'efvaporas airesult of the draft Y between-.,theffshells.

In; the` use-ofmy improved.. construction, it will; befunderstoodithat the distillate burner is ignited `irl-any usual manner; and. ,thatthe same bring-s ther vapor-izings chamber I0- of theA power burner to ar suitablefvaporizing. temperature, and that: the f distillate-burner maintains the same at Further, it willbe understood that whenair under'pressure is=.admittedto -thetube- I2,v this air entrains the vapor'rising in thevaporizing. chamber II'Land creates a combustible, mixture which ignites above the-V outlet ofthe ytube I I2, the baillering I4iin the. path of the rising vapor alsoY assisting in. producingIaneiIeotive mixture. It.will also be understood that the, flame extending up. through thecombustion -chamber withinthe tube I 6` is,A as.; usual, blueA at its base and tothe .top

oi this tube, and White `abovethe latter, in such manner. that the blue or heatingjilameV within the, tube, acts .further to heatV the vaporizing chamber, III, While theV white or radiant flame above the end of the tube I6 is adapted for effective'heating purposes. In Figure 5 I have shown my-improvedmcombined'lburner arranged in a usual Amanner in the fire box 22 of-a usual steam, hotwater, or'airheater23, the same beingenclosed Withinausual casing 24 andprovided` with air'v through' a suitable-airconduit 25 connected tota-blower 26,1 while oil to. the carbon leg.y 20 ofA the distillate burner is'supplied through' a .pipe 2.'Iand"loil.to thei carbon leg I'Iofi'thefpower burner is :supplied through axpipe. 28.. B0th-of these pipes 2'I and 'i28ffaret connected asusual tota; constant .levelfloatchamberv 29# also carryingzusual; 'metering valves 3U' and '3 I establishingfthe desired maximum flows Vfrom this chamb'erftothe distillate burner-and power burner, respectively.

As fa-result of myfimproved construction, itis madecpossible very-` substantially to increase the capacity of-.Jthe power burner as compared zwith prior` constructions and Without disturbing the automatic starting of the power burner upon the admission of oil to the carbon leg II and air under pressure through the pipe I3. Further, it is found that the distillate burner continues satisfactorily to function to maintain the Vaporizing `.chamber I0 of the power burner at Vaporizing temperatures, both during the operation of the power burner and when the latter burner is shut down, so that the power burner may be started at any time upon resumption of oil and air supplies thereto. It will further be evident that both burners will continue to be controlled bythe float valve mechanism 29 in such manner as to maintain a predetermined maximum level of oil therein when starting both burners, while it will also be clear that during the operation of both burners, each will continue to cooperate as desired, in such manner that the liquid oil supplied through the connections 21 and 28 is so heated by the burner base I as to enter the vaporizing chambers I0 and I9'in the form of vapor during normal operation While I have herein-specifically described one form-Which my invention may assume inpractice, itwill be understood that the same has been shown for purposes of illustration, and that my invention may be modified. and embodied, in other forms withoutdeparting fromits spirit or the scope of thezappended claims.

What I lclaim as new and desire to secure by Letters Patent'is: Y

1. In a combined distillate-and power burner, a burner base havingcoaxial.communicating-.inner and outer distillate burner-grooves, a Vaporizing chamber for supplyingvaporized fuel-.to said grooves and located outside the lateralv limitsA of said innerl groove and air supply passage vmeans extended upwardly through said base, axially disposed communicating power burner arnev and pressure air passage forming means and having `the former extending abovethe baseand within saidA distillate burner, and a power burner vaporizing chamber maintained at a fuel vaporizing temperature by said distillate burner andsurrounding said pressure air passage means and communicating with said flame passage means and having its outer wally adjacent said inner groove.

2. In a combined distillate-and power burner, a burner base having coaxial communicating inner and outer distillate burner'grooves, a vaporizing chamber for supplying vaporized fuel to said grooves and located outside the lateral limits of said inner groove and air supply passage means extended upwardly through said' base, axially disposed communicating power burner flame-and pressure air passage forming means and having the former extending above the base and within said distillate burner, andv a power burner'vaporizing chamber maintained at a fuel'vaporizing temperature by said distillate burner and: surrounding said pressure air passage means; and communicating with said flame passage means; said air passage means for saidgrooves including annularly `disposed air supply means within said inner groove and having an inner wall formed by the outer wall of said vaporizing chamber and flame passage means.

3. In a combined distillate and power'burner, a burnerV base having coaxial communicating inner and outer distillate burner grooves, a vaporizingl chamberV for supplying vaporized fuel to saidgrooves and located outside the lateral limits of ,said inner groove and air supply passage lmeans including an annular. air passage inside the nner groove, axially disposed communicating power burner flame and pressure air passage forming means andV having the former extending above the base and within said distillate burner, and a power burner vaporizing chamber maintained at a fuel vaporizing temperature by said distillate burner and surrounding said pressure air passage means and communicating with said llame passage means and having its outer wall forming the inner wall of said annular air passage.

4. In a combined distillate and power burner, a distillate burner including a base having an annular fuel groove and means outside the lateral limits of said groove for supplying vaporized fuel thereto, means forming a combustion space above said groove, and means for supplying air to the ame in said space, and a power burner axially disposed in said base including communicating flame and pressure air passage forming means and having said flame passage means extending above said base and within said distillate burner, an-d also having a vaporizing chamber maintained at a fuel vaporizing temperature by said distillate burner and surrounding said air passage forming means and discharging vapor upwardly into said llame passage means, said vaporizing -chamber being disposed in substantially the same horizontal planes as said groove and having its side wall adjacent said groove and its bottom slightly lower than the bottom of said groove.

5. In a combined distillate and power burner, a burner base having coaxial communicating inner and outer distillate burner grooves and axial communicating power burner pressure air and ame passage forming means and having the latter extending above the base and within said distillate burner, a power burner vaporizing chamber maintained at a fuel vaporizing temperature by said distillate burner and surrounding said air passage means and delivering into said ame passage means, and a distillate burner vaporizing chamber eccentrically disposed with respect to said power burner vaporizing chamber and outside the lateral limits of said inner groove and communicating with said grooves.

6. In a combined distillateand power burner, a burner base having coaxial communicating inner and outer distillate burner grooves and axial communicating power burner pressure air and flame passage forming means and having the latter extending above the base and Within said distillate burner. a power burner vaporizing chamber maintained ata fuel vaporizing temperature by said distillate burner and surrounding said air passage means and delivering into said flame passage means, and a distillate burner vaporizing chamber disposed between said grooves and communicating therewith.

'7. In a combined distillate and power burner, a burner base having coaxial communicating inner and outer distillate burner grooves, a vaporizing chamber for supplying vaporized fuel to said grooves and located outside the lateral limits oi said inner groove and air supply passage means extended upwardly through said base, axially disposed communicating power burner llame and pressure air passage forming means and having the former extending above the base and within said distillate burner, a power burner vaporizing chamber maintained at a fuel vaporizing temperature by said distillate burner and surrounding said air passage means and communicating with said flame passage means and having a wide bottom, and a baffle ring overlying the chamber top in said flame passage means above both said chamber and air passage means and having an axial opening at least as large as said air supply passage means.

LYN'N O. SELBY. 

